I've been wondering about this too - I'm 22 weeks and have put on about 6kg. Seemed like a lot at first but then I figured I put on about 13kg with DD and lost it all in the first month or so. I'm half way now so I've still got a bit of room to move till I hit 13kg again. I don't really want to go much over that if I can help it.

I'm not obsessing over it but I've been quite overweight in the past and don't ever want to go there again.

Sounds like we're all doing OK!